helliwell



Patented May 19, 1885.

STEAM TRAP.

R. BFHELLIWELL.

(No Model.)

ATTO RN EY.

III!

N Firms Phulo-Lithngnpheh Washington, D.C.

UNITED STATES PATENT OFFICEQ ROBERT B, HELLIWELL, OF PHILADELPHIA,PENNSYLVANIA, ASSIGNOR OF ONE-HALF TO DANIEL STEINMETZ, SR, AND PHILIPJ. STEINMETZ, OF SAME PLACE, AND DANIEL STEINMETZ, JR., OF OOLMAR, PA.

STEAM-TRAP.

SPECIFICATION forming part of Letters Patent No. 318,249, dated May 19,1885.

Application filed January 24, 1885. (No model.)

T at whom it may concern:

Be it known that I, ROBERT B. HELLIWELL, a subject of the Queen of GreatBritain, residing in the city and county of Philadelphia,

State of Pennsylvania, have invented anew and useful Improvement inSteam-Traps, which improvement is fully set forth in the followingspecification and accompanying drawing, in which the figure represents acentral vertical section of a steam-trap embodying my invention.

My invention consists of improvements in a steam-trap, as will behereinafter fully set forth. A

r 5 Referring to the drawing, A represents a float, which is locatedwithin a 'casing, B,both formed of suitable metal or other material.

0 represents the inlet, and D represents the outlet, of said casing theoutlet being in communication with a pipe, E, which depends from the topor cap of the casing B, passes into the float A, and has its lower endconnected with a valve-box, F, which latter, as will be seen, is locatedwithin the float near the bottom thereof.

On the inner face of the top of the box F is a valve-seat, G, belowwhich, within the box, is a piston, H, from the center of which rises avalve, H, it being noticed that said valve and valve seat are tubular orperforated, so as to be in communication with the pipe E.

The inner wall of the opening of the valve H forms a seat for a valve,J, which is se- 5 cured to the bottom of the float A, and passes freelythrough the bottom of the box F.

Bearing against the under side of the valve H is a spring, K, the objectof which is to force said valve against its seat G.

In the sides of the box F are ports a, which provide the means ofcommunication between the float A and the interior of said box.

The piston H has a diameter a fraction-- say one sixty-fourth inch--1essthan that of the valve-box.

The valve J, which I term an auxiliary Valve, is actuated by the floatA, and rises and falls therewith according to the level of watertherein, and said float is balanced so that it will float just when thewater-level therein reaches the middle of its depth, there remainingconsiderable water over the valvebox when, the valve closes.

When the float becomes filled or partially filled with water, whichrises in the casing B and flows into the float over the top of the same,it sinks, thus opening the valve J and allowing the pressure to leak outthereat, the excess of pressure on the upper side of the piston H thenforcing the latter downwardly, and thereby opening the main valve H.When the condensation ceases,the water becomes low in the float, and thelatter then rises, and with it the valve J, so that the auxiliary valveJ is again closed. The pressure on the upper side of the piston H nowleaks down through the space between the piston and box F, and on thepressure becoming equal the spring K lifts the piston and closes themain valve.

The valve H may be enlarged or reduced in area, so as to give avalve-opening of any desired capacity without interfering with theeffectual working of the trap or changing the size thereof. 5

Having thus described my invention, what I claim as new, and desire tosecure by Letters Patent, is-

1. A steam-trap provided with a float and having within the said float adepending pipe secured to the casing and afixed valve-box secured tosaid pipe, the said valve-box having a main valve furnishing a seat foran auxiliary valve, substantially as described.

2. A steam-trap having a casing, and a float therein, and a fixedvalve-box, the latter being within the float and provided with a mainvalve, an auxiliary valve, and seats therefor, the auxiliary valve beingattached to and moving with the float, substantially as and for thepurpose set forth.

3. In a steam-trap, a piston having a valve and a valve-seat, anauxiliary valve attached to the float of the trap, and a spring withinthe Valve-box bearing against the piston, for forcingthe Valve thereofagainst its" seat in said box, said parts being combined and operatingsubstantially as and for the purpose Set forth.

4. In asteam-trap,avalve-boxhaving a valveseat, in combination with apiston carrying avalve and having a valve-seat for an auX iliary valve,which latter is connected with the float of the trap, said box andpiston IO having a space between them, substantially as and for thepurpose set forth.

ROBT. B. HELLIWELL. Witnesses:

JOHN A. WIEDERsHEIM, A. 1?. GRANT.

